Update fledge-tester-list.md

Added Paapi as a DSP

fledge-tester-list.md

@@ -88,6 +88,7 @@ The usefulness of this page depends on testers sharing information and updates.
 | Lucead | DSP & SSP | Testing in progress | | privacysandbox@lucead.com |
 | Optable | DSP & SSP | Testing in progress | | privacysandbox@optable.co |
 | Taboola | DSP & SSP | Testing in progress | | privacy-sandbox@taboola.com |
+| Paapi | DSP | Testing in progress | | privacysandbox@paapi.ai |
 
 ## Table - Publishers and Advertisers Interested in Testing or Early Adoption
 Companies who may be interested in participating in tests and early adoption opportunities provided by ad tech companies.